Which of the following is an example of a chemical property of an element?

Which of the following statements about chemical formulas is false?

Which chemical is commonly added to municipal water supplies to help prevent tooth decay?

Which of the following statements about chemical reactions is true?

Which of the following describes a chemical property of water?

Which of the following is formed when cast iron and wrought iron are mixed together?

Which of the following is an indicator that a chemical reaction has occurred?

Why does hydrogen (H) have a different subscript in each chemical formula of various substances?